Fixed Pulleys Quiz

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Questions and Answers

What is the main function of a fixed pulley?

  • To decrease the distance an object must be moved
  • To increase the amount of force needed to lift an object
  • To lift objects vertically with no assistance
  • To change the direction of the force applied (correct)

How does the boys' use of a fixed pulley make lifting easier?

  • It enables them to pull down instead of lifting up (correct)
  • It redistributes the weight evenly among all boys
  • It allows them to lift the bucket directly over their heads
  • It reduces the weight of the bucket being lifted

In what way does a fixed pulley differ from a movable pulley?

  • A fixed pulley requires no force to operate
  • A fixed pulley remains stationary while lifting a load (correct)
  • A fixed pulley is lighter than a movable pulley
  • A fixed pulley consists of multiple wheels

What could be an additional way to make pulling the rope easier when using a fixed pulley?

<p>Having multiple boys pull on the rope (B)</p> Signup and view all the answers

Which of the following is NOT a common application of fixed pulleys?

<p>Walking dogs (B)</p> Signup and view all the answers

What is the role of the hook used by the boys while setting up the pulley?

<p>To secure the pulley in place (C)</p> Signup and view all the answers

Why might attaching weights to the rope be beneficial when using a fixed pulley?

<p>It can balance the force applied by the boys (D)</p> Signup and view all the answers

Which of the following statements about fixed pulleys is true?

<p>They have been used for thousands of years (A)</p> Signup and view all the answers

How does the direction of motion change when using a fixed pulley?

<p>The force applied pulls down while the load is lifted up (D)</p> Signup and view all the answers

What is a common misconception about fixed pulleys?

<p>They reduce the weight of the load being lifted (D)</p> Signup and view all the answers

Flashcards

What is a fixed pulley?

A simple machine that uses a wheel with a groove and a rope to change the direction of force.

What is a load?

The object being lifted or moved using a pulley.

What is a fixed pulley?

A pulley where the wheel remains stationary and only the rope moves.

What is a pulley?

A simple machine that makes work easier by changing the direction of force.

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What is a movable pulley?

A pulley that moves along with the load.

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How does a fixed pulley make work easier?

A fixed pulley makes it easier to lift objects by changing the direction of force, so you pull down instead of lifting up.

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What are some real-world examples of fixed pulleys?

They can be used to lift heavy objects, like rocks or buckets of water, and are found in machines like elevators.

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How are fixed pulleys used on flagpoles?

A fixed pulley can be used to raise and lower flags on a flagpole without needing to climb.

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How can a fixed pulley be used for laundry?

A horizontal fixed pulley can be used to bring laundry to you without walking back and forth along a clothesline.

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How are fixed pulleys used on fishing poles?

Fishing poles use a fixed pulley to move the fishing line from the water.

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Study Notes

Fixed Pulleys

  • A fixed pulley is a simple machine with a wheel and groove for a rope, used to move a load.
  • The rope is attached to the load (e.g., a bucket of cars) and the wheel is fixed, meaning it doesn't move.
  • The pulley changes the direction of the force required to lift a load. Pulling down on one end of the rope lifts the load.
  • Using a fixed pulley doesn't reduce the force needed to lift the load but simplifies the direction.
  • Examples of fixed pulley use: raising/lowering flags, lifting heavy objects, operating elevators, moving sails, laundry lines, fishing poles.

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